Blackfin arch: Fix CCLK and SCLK checks

Fix CCLK and SCLK checks, combine all arch checks into one file
for maintance. Checkins that remove more lines than they add are always
good.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

8 files changed, 174 insertions, 64 deletions

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 5c1e215c8b6..9ce675e8026 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -323,7 +323,7 @@ config CMDLINE
 	  to the kernel, you may specify one here. As a minimum, you should specify
 	  the memory size and the root device (e.g., mem=8M, root=/dev/nfs).
 
-comment "Board Setup"
+comment "Clock/PLL Setup"
 
 config CLKIN_HZ
 	int "Crystal Frequency in Hz"
@@ -335,6 +335,118 @@ config CLKIN_HZ
 	help
 	  The frequency of CLKIN crystal oscillator on the board in Hz.
 
+config BFIN_KERNEL_CLOCK
+	bool "Re-program Clocks while Kernel boots?"
+	default n
+	help
+	  This option decides if kernel clocks are re-programed from the
+	  bootloader settings. If the clocks are not set, the SDRAM settings
+	  are also not changed, and the Bootloader does 100% of the hardware
+	  configuration.
+
+config PLL_BYPASS
+        bool "Bypass PLL"
+        depends on BFIN_KERNEL_CLOCK
+        default n
+
+config CLKIN_HALF
+	bool "Half Clock In"
+	depends on BFIN_KERNEL_CLOCK && (! PLL_BYPASS)
+	default n
+	help
+	  If this is set the clock will be divided by 2, before it goes to the PLL.
+
+config VCO_MULT
+	int "VCO Multiplier"
+	depends on BFIN_KERNEL_CLOCK && (! PLL_BYPASS)
+	range 1 64
+	default "22" if BFIN533_EZKIT
+	default "45" if BFIN533_STAMP
+	default "20" if BFIN537_STAMP
+	default "22" if BFIN533_BLUETECHNIX_CM
+	default "20" if BFIN537_BLUETECHNIX_CM
+	default "20" if BFIN561_BLUETECHNIX_CM
+	default "20" if BFIN561_EZKIT
+	help
+	  This controls the frequency of the on-chip PLL. This can be between 1 and 64.
+	  PLL Frequency = (Crystal Frequency) * (this setting)
+
+choice
+	prompt "Core Clock Divider"
+	depends on BFIN_KERNEL_CLOCK
+	default CCLK_DIV_1
+	help
+	  This sets the frequency of the core. It can be 1, 2, 4 or 8
+	  Core Frequency = (PLL frequency) / (this setting)
+
+config CCLK_DIV_1
+	bool "1"
+
+config CCLK_DIV_2
+	bool "2"
+
+config CCLK_DIV_4
+	bool "4"
+
+config CCLK_DIV_8
+	bool "8"
+endchoice
+
+config SCLK_DIV
+	int "System Clock Divider"
+	depends on BFIN_KERNEL_CLOCK
+	range 1 15
+	default 5 if BFIN533_EZKIT
+	default 5 if BFIN533_STAMP
+	default 4 if BFIN537_STAMP
+	default 5 if BFIN533_BLUETECHNIX_CM
+	default 4 if BFIN537_BLUETECHNIX_CM
+	default 4 if BFIN561_BLUETECHNIX_CM
+	default 5 if BFIN561_EZKIT
+	help
+	  This sets the frequency of the system clock (including SDRAM or DDR).
+	  This can be between 1 and 15
+	  System Clock = (PLL frequency) / (this setting)
+
+#
+# Max & Min Speeds for various Chips
+#
+config MAX_VCO_HZ
+	int
+	default 600000000 if BF522
+	default 600000000 if BF525
+	default 600000000 if BF527
+	default 400000000 if BF531
+	default 400000000 if BF532
+	default 750000000 if BF533
+	default 500000000 if BF534
+	default 400000000 if BF536
+	default 600000000 if BF537
+	default 533000000 if BF538
+	default 533000000 if BF539
+	default 600000000 if BF542
+	default 533000000 if BF544
+	default 533000000 if BF549
+	default 600000000 if BF561
+
+config MIN_VCO_HZ
+	int
+	default 50000000
+
+config MAX_SCLK_HZ
+	int
+	default 133000000
+
+config MIN_SCLK_HZ
+	int
+	default 27000000
+
+comment "Kernel Timer/Scheduler"
+
+source kernel/Kconfig.hz
+
+comment "Memory Setup"
+
 config MEM_SIZE
 	int "SDRAM Memory Size in MBytes"
 	default  32 if BFIN533_EZKIT
@@ -448,10 +560,6 @@ endmenu
 
 menu "Blackfin Kernel Optimizations"
 
-comment "Timer Tick"
-
-source kernel/Kconfig.hz
-
 comment "Memory Optimizations"
 
 config I_ENTRY_L1
@@ -672,63 +780,6 @@ config L1_MAX_PIECE
 	  Set the max memory pieces for the L1 SRAM allocation algorithm.
 	  Min value is 16. Max value is 1024.
 
-menu "Clock Settings"
-
-
-config BFIN_KERNEL_CLOCK
-	bool "Re-program Clocks while Kernel boots?"
-	default n
-	help
-	  This option decides if kernel clocks are re-programed from the
-	  bootloader settings. If the clocks are not set, the SDRAM settings
-	  are also not changed, and the Bootloader does 100% of the hardware
-	  configuration.
-
-config VCO_MULT
-	int "VCO Multiplier"
-	depends on BFIN_KERNEL_CLOCK
-	default "22" if BFIN533_EZKIT
-	default "45" if BFIN533_STAMP
-	default "20" if BFIN537_STAMP
-	default "22" if BFIN533_BLUETECHNIX_CM
-	default "20" if BFIN537_BLUETECHNIX_CM
-	default "20" if BFIN561_BLUETECHNIX_CM
-	default "20" if BFIN561_EZKIT
-
-config CCLK_DIV
-	int "Core Clock Divider"
-	depends on BFIN_KERNEL_CLOCK
-	default 1 if BFIN533_EZKIT
-	default 1 if BFIN533_STAMP
-	default 1 if BFIN537_STAMP
-	default 1 if BFIN533_BLUETECHNIX_CM
-	default 1 if BFIN537_BLUETECHNIX_CM
-	default 1 if BFIN561_BLUETECHNIX_CM
-	default 1 if BFIN561_EZKIT
-
-config SCLK_DIV
-	int "System Clock Divider"
-	depends on BFIN_KERNEL_CLOCK
-	default 5 if BFIN533_EZKIT
-	default 5 if BFIN533_STAMP
-	default 4 if BFIN537_STAMP
-	default 5 if BFIN533_BLUETECHNIX_CM
-	default 4 if BFIN537_BLUETECHNIX_CM
-	default 4 if BFIN561_BLUETECHNIX_CM
-	default 5 if BFIN561_EZKIT
-
-config CLKIN_HALF
-	bool "Half ClockIn"
-	depends on BFIN_KERNEL_CLOCK
-	default n
-
-config PLL_BYPASS
-	bool "Bypass PLL"
-	depends on BFIN_KERNEL_CLOCK
-	default n
-
-endmenu
-
 comment "Asynchonous Memory Configuration"
 
 menu "EBIU_AMBCTL Global Control"
diff --git a/arch/blackfin/mach-bf533/head.S b/arch/blackfin/mach-bf533/head.S
index 69da0e8b773..9c5378bb8a2 100644
--- a/arch/blackfin/mach-bf533/head.S
+++ b/arch/blackfin/mach-bf533/head.S
@@ -32,6 +32,7 @@
 #include <asm/blackfin.h>
 #include <asm/trace.h>
 #if CONFIG_BFIN_KERNEL_CLOCK
+#include <asm/mach-common/clocks.h>
 #include <asm/mach/mem_init.h>
 #endif
 #if CONFIG_DEBUG_KERNEL_START
diff --git a/arch/blackfin/mach-bf537/head.S b/arch/blackfin/mach-bf537/head.S
index b1d4b91b7ae..82ea0470591 100644
--- a/arch/blackfin/mach-bf537/head.S
+++ b/arch/blackfin/mach-bf537/head.S
@@ -33,6 +33,7 @@
 #include <asm/trace.h>
 
 #if CONFIG_BFIN_KERNEL_CLOCK
+#include <asm/mach-common/clocks.h>
 #include <asm/mach/mem_init.h>
 #endif
 
diff --git a/arch/blackfin/mach-bf548/head.S b/arch/blackfin/mach-bf548/head.S
index 47cd91777a3..72087c2e6a8 100644
--- a/arch/blackfin/mach-bf548/head.S
+++ b/arch/blackfin/mach-bf548/head.S
@@ -31,6 +31,7 @@
 #include <asm/blackfin.h>
 #include <asm/trace.h>
 #if CONFIG_BFIN_KERNEL_CLOCK
+#include <asm/mach-common/clocks.h>
 #include <asm/mach/mem_init.h>
 #endif
 
diff --git a/arch/blackfin/mach-bf561/head.S b/arch/blackfin/mach-bf561/head.S
index 173893429b0..83cd3f9bbf2 100644
--- a/arch/blackfin/mach-bf561/head.S
+++ b/arch/blackfin/mach-bf561/head.S
@@ -33,6 +33,7 @@
 #include <asm/trace.h>
 
 #if CONFIG_BFIN_KERNEL_CLOCK
+#include <asm/mach-common/clocks.h>
 #include <asm/mach/mem_init.h>
 #endif
 
diff --git a/arch/blackfin/mach-common/Makefile b/arch/blackfin/mach-common/Makefile
index 0279ede7039..4d7733dfd5d 100644
--- a/arch/blackfin/mach-common/Makefile
+++ b/arch/blackfin/mach-common/Makefile
@@ -4,7 +4,7 @@
 
 obj-y := \
 	cache.o cacheinit.o cplbhdlr.o cplbmgr.o entry.o \
-	interrupt.o lock.o irqpanic.o
+	interrupt.o lock.o irqpanic.o arch_checks.o
 
 obj-$(CONFIG_CPLB_INFO)          += cplbinfo.o
 obj-$(CONFIG_BFIN_SINGLE_CORE)   += ints-priority-sc.o
diff --git a/arch/blackfin/mach-common/arch_checks.c b/arch/blackfin/mach-common/arch_checks.c
new file mode 100644
index 00000000000..f9160d83b91
--- /dev/null
+++ b/arch/blackfin/mach-common/arch_checks.c
@@ -0,0 +1,55 @@
+/*
+ * File:         arch/blackfin/mach-common/arch_checks.c
+ * Based on:
+ * Author:	 Robin Getz <rgetz@blackfin.uclinux.org>
+ *
+ * Created:      25Jul07
+ * Description:  Do some checking to make sure things are OK
+ *
+ * Modified:
+ *               Copyright 2004-2007 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <asm/mach/anomaly.h>
+#include <asm/mach-common/clocks.h>
+
+#ifdef CONFIG_BFIN_KERNEL_CLOCK
+
+# if (CONFIG_VCO_HZ > CONFIG_MAX_VCO_HZ)
+#  error "VCO selected is more than maximum value. Please change the VCO multipler"
+# endif
+
+# if (CONFIG_SCLK_HZ > CONFIG_MAX_SCLK_HZ)
+# error "Sclk value selected is more than maximum. Please select a proper value for SCLK multiplier"
+# endif
+
+# if (CONFIG_SCLK_HZ < CONFIG_MIN_SCLK_HZ)
+# error "Sclk value selected is less than minimum. Please select a proper value for SCLK multiplier"
+# endif
+
+# if (ANOMALY_05000273) && (CONFIG_SCLK_HZ * 2 > CONFIG_CCLK_HZ)
+# error "ANOMALY 05000273, please make sure CCLK is at least 2x SCLK"
+# endif
+
+# if (CONFIG_SCLK_HZ > CONFIG_CCLK_HZ) && (CONFIG_SCLK_HZ != CONFIG_CLKIN_HZ) && (CONFIG_CCLK_HZ != CONFIG_CLKIN_HZ)
+# error "Please select sclk less than cclk"
+# endif
+
+#endif /* CONFIG_BFIN_KERNEL_CLOCK */
diff --git a/arch/blackfin/mach-common/dpmc.S b/arch/blackfin/mach-common/dpmc.S
index 04194dca015..39fbc286110 100644
--- a/arch/blackfin/mach-common/dpmc.S
+++ b/arch/blackfin/mach-common/dpmc.S
@@ -300,7 +300,7 @@ ENTRY(_sleep_deeper)
 	P0.H = hi(PLL_CTL);
 	P0.L = lo(PLL_CTL);
 	R5 = W[P0](z);
-	R0.L = (MIN_VC/CONFIG_CLKIN_HZ) << 9;
+	R0.L = (CONFIG_MIN_VCO_HZ/CONFIG_CLKIN_HZ) << 9;
 	W[P0] = R0.l;
 
 	SSYNC;